Chair-hub pattern.



JULIUS M. GERMANSON, OF MILVAUKEE, WISCONSIN.

CHAIR-HUB PATTERN.

Specication of Letters Patent.

Patented Dec. 4, 1906.

Application tiled January 26, 1906. Serial No. 298,014.

T0 all whom, it m/tg/ concern.'

Be it known that I, J ULrUs M. GnRMANsoN, a citizen ofthe United States,residing at Milwaukee, county of Milwaukee, and State of Visconsin, haveinvented new and useful Improvements in Chair-Hub Patterns, of which thefollowing is a s ecification.

My invention re ates to improvements in patterns employed in the processof manufacturing chair-hubs.

The object of my invention is, among other things, first, to provide apattern by which the leg-retaining channels of a hub may be moreaccurately made and the walls of the channels given a smoother and lmoreuniform finish; second, to provide me ans whereby the leg-retainingstuds upon the-lower side of the cap-plate of the hub are formed in theexact proper relative position to the walls of the leg-channels, third,to provide means whereby the dry-sand cores employed in forming theleg-channels of the hub serve as guide-bearings which facilitate theremoval ofthe pattern from the mold and also whereby I am able to useseveral patterns connected together in a single gate, and thereby makefour or more molds at the same time, while by the old process in whichgreen-sand cores are used one mold only can be successfully made at onetime, and, fourth, to provide a pattern in which the body portion andthe cap-plate are formed integrally, whereby both of said parts -in allof the several patterns connected together in a single gate may besimultaneously drawn from the sand, whereby time and labor are saved andthe output of a molder is largely increased.

My invention is further explained by reference to the accompanyingdrawings, in Which- Figure l represents a side view, part broken away,of^a chair-hub made by my improved patterns and molds. Fig. 2 representsa side view of two sets of my improved patterns connected together in asingle gatel and supported upon a match-board within a flask, and Fig` 3represents a top view of the parts shown in Fig. 2, Fig. 4 is a detailrepresenting a side view of one of the dry-sand cores.

Like parts are identified by the same reference-letters throughout theseveral views.

My hub comprises the body portion A, provided with leg-retainingchannels B, capplate C, and leg-retaining studs D, which studs areadapted to engage in recesses provided therefor in the supporting-legsE, as

shown in Fig. 1. The pattern employed in the manufacturing of the hubcomprises the body portion F, provided with a plurality of channels Grfor the reception of' the sand cores I-I, base-plate I, core-prints Jand J', and a plurality of studs K. The lower end of the dry-sand coresI-I are provided when made with semicircular recesses L for thereception of the said studs K, which recesses are adapted to lit aroundand cover the il. ner sides of said studs. are connected together by thegate M. N represents the match-board upon which the patterns aresupported.. The match-boards N are provided with recesses O for thereception of the lower core-prints J. P represents the so-called "dragor bottom part of the flask. Q represents the base-board.

In using my improved patterns the first step in the process is to placethe several gated patterns upon the match-board N with the core-'printsJ in the apertures O and the protruding ends of the dry-sand cores II upwhen the drag-flask P is placed around the patterns upon thematch-board. This being done, green sand is rammed around the patternsand dry-sand cores up to the top ofthe flask I?, when the same is struckofl' level with the top of the flask, The board Q is then put in placeupon the upper edge of the flask, and the molds with the patternstherein are inverted, and the match-board N is removed when the ordinarycope or top part of the flask is put on and rammed full of sand. l/Vhenthe cope has been filled with sand, itis struck ofl' on a level with itsupper edge, when the co e is removed, leaving the print of the cap-p ateI and the core print J in the cope. The gated patterns are then drawnfrom the mold, leaving the dry-sand cores II in place. When the dry-sandcores K', (shown in Fig. 4,) which formthe central aperture of the hub,are placed in the coreprints J', the cope is replaced and the flask isready for the reception ofthe molten metal.

It will be understood that any desired number of' patterns may beconnected together in a single gate and used in the manner described. Itwill also be understood that the dry-sand cores II, which form theleg-retaining channels of the hub, and the dry-sand cores K', which formthe central aperture ol' the hub, are prepared in ordinary core-boxesused for such purposes preparatory to use. vWhile owing to the fact thateach pattern in the gate is provided with a rIwo or more patterns F IIOplurality of dry-sand cores H, said cores I-I serve as guide-bearings tothe pattern and facilitate removing the same from the mold, while saiddry-sand cores form a much smoother and more perfect lee-retainingchannel in the hub than it would be possible to form by the ordinarygreen-sand cores heretofore used.

Having thus described my invention, what I claim as new, and desire to'secure by Letters.y Patent, is-

1. Ina chair-hub pattern the combination of a central body portionprovided with a plurality of longitudinal core-receiving channels and acap-plate formed integrally with said body portion, substantially as setforth.

2. In a chair-hub pattern the combination of a central body portionprovided with a plurality of longitudinal core-receiving channels, acap-plate formed integrally with said body portion and provided with aplurality of studs projecting from the face of said capplate parallelwith said body ortion.

3'. In a chair-hubpattern t e combination of a central-body portionprovided at one end with a cap-plate and at its respective ends withcentrally-located core-prints and on its sides with a plurality of lonitudinal corereceiving channels, substantia ly as set forth.

4. The. combination of a plurality of chairhub atterns, each pattern comrisin@V a central body portion provided wit cap-plate and twocentrally-located coreprints formed inte rally with said centralportion, substantial y as set forth.

5. In a chair-hub pattern the combination of a plurality of central bodyportions F rigidly connected together, each body portion F beingprovided with longitudinal core-receiving channels G and a oapplate Iformed intea plurality `of longitudinal core-receiving channels, a

grally with one end of its central portion,'

